Landing gear light peculiarities, or why you should study these schematics

[Martin S.]

Hello Gents,

I Recently studies the schematics of my 78 J ( although it seems to apply to all electric gear Mooneys) and stumbled over this.

The gear warning tone generator (that alerts at idle gas and gear up) and the landing gear indication lights are on the same power line. The warning system has its own circuit breaker, the gear down light hasn’t. This means that if you pull the circuit breaker of the gear warning (for whatever reason), the gear down lights (between the seats and in the annunciator) will not work. This is very confusing, as both systems fulfill distinct functions, one warns, the other indicates - so you don’t expect it.

I think knowing this peculiarity is noteworthy and might help avoiding risky misunderstanding during operation.

 

Hope I didn’t bore you with these lines,

 

Martin

[LANCECASPER]

3 hours ago, Martin S. said:

Hello Gents,

I Recently studies the schematics of my 78 J ( although it seems to apply to all electric gear Mooneys) and stumbled over this.

The gear warning tone generator (that alerts at idle gas and gear up) and the landing gear indication lights are on the same power line. The warning system has its own circuit breaker, the gear down light hasn’t. This means that if you pull the circuit breaker of the gear warning (for whatever reason), the gear down lights (between the seats and in the annunciator) will not work. This is very confusing, as both systems fulfill distinct functions, one warns, the other indicates - so you don’t expect it.

I think knowing this peculiarity is noteworthy and might help avoiding risky misunderstanding during operation.

 

Hope I didn’t bore you with these lines,

 

Martin

Also if your nav lights are on your gear down light will be dimmed.